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TOPIC atoz
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The Effect of different etching current densities on the formation of antireflection porous silicon coating used for Solar Cells industry has been investigated. The results show that both the initial surface morphologies and the anodizing etching condition affected on photoluminescence (PL) and the reflectance of the resulting surface. Large number of pores uniformly distributed on overall surface with average pore diameter from 5.80 to 6.20 nm was observed. The vertices of the straight pyramids of the textured Si wafers are etched away during the electrochemical etching and frustums of the pyramids are formed. The pyramid frustums contain nanopores. The PL intensity increases and the PL peak shows a blue shift that could be related to the quantum size effect (QSE) due to the thinning of filaments by the oxidation process. However 1
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up-solid down-solid